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Perivascular Potassium and pH as Determinants of Local Pial Arterial Diameter in Cats: A MICROAPPLICATION STUDY
Abstract
The effects of and the interaction between local perivascular variation in potassium and bicarbonate concentration on the diameter of pial arteries were studied in cats by the microapplication technique. At 11 mEq/liter of bicarbonate, a direct correlation existed between vascular diameter and K + concentrations between 0 and 10 mEq/liter. At K + concentrations between 10 and 20 mEq/liter, no further increase in vascular diameter was observed. At a K + concentration of 5 mEq/liter, an inverse relationship existed between pial arterial diameter and perivascular bicarbonate concentrations between 0 and 22 mEq/liter. At K + concentrations of 0 and 10 mEq/liter, the pial arterial diameter was determined strongly by the K + concentration and was only slightly, if at all, influenced by bicarbonate concentrations between 5 and 22 mEq/liter. At lower bicarbonate concentrations the local acidity induced a marked vasodilation. The results indicate that the diameter of pial arterioles in cats is affected by periarteriolar concentrations of K + and H + ; the degree of the vasoreaction induced by H + is modulated by K + .
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Cites
FINE STRUCTURAL LOCALIZATION OF A BLOOD-BRAIN BARRIER TO EXOGENOUS PEROXIDASE
Reese, T. S., & Karnovsky, M. J. (1967) · The Journal of Cell Biology · doi:10.1083/jcb.34.1.207 · Cited by 2,629
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Spreading Depression, Spreading Depolarizations, and the Cerebral Vasculature
Ayata, C., & Lauritzen, M. (2015) · Physiological Reviews · doi:10.1152/physrev.00027.2014 · Cited by 555
Capillary K+-sensing initiates retrograde hyperpolarization to increase local cerebral blood flow
Longden, T. A., Dabertrand, F., Koide, M., Gonzales, A. L., Tykocki, N. R., Brayden, J. E., Hill-Eubanks, D., & Nelson, M. T. (2017) · Nature Neuroscience · doi:10.1038/nn.4533 · Cited by 522
Analysis of vasoactivity of local pH, PCO2 and bicarbonate on pial vessels.
Kontos, H. A., Raper, A. J., & Patterson, J. L. (1977) · Stroke · doi:10.1161/01.str.8.3.358 · Cited by 353
Knot, H. J., Zimmermann, P. A., & Nelson, M. T. (1996) · The Journal of Physiology · doi:10.1113/jphysiol.1996.sp021318 · Cited by 331
The concept of coupling blood flow to brain function: Revision required?
Lou, H. C., Edvinsson, L., & MacKenzie, E. T. (1987) · Annals of Neurology · doi:10.1002/ana.410220302 · Cited by 301
Metadata
- Authors
- Kuschinsky, W., Wahl, M., Bosse, O., & Thurau, K.
- Venue
- Circulation Research
- Published
- 1972-08
- Volume
- 31
- Issue
- 2
- Pages
- 240-247
- ISSN
- 0009-7330 (ISSN-L)
- 1524-4571
- OpenAlex
- W2088629791
- Cited by
- 288
- References
- 1
- FWCI
- 15.00
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Perivascular Potassium and pH as Determinants of Local Pial Arterial Diameter in Cats: A MICROAPPLICATION STUDY. https://app.cochat.ai/papers/10.1161/01.res.31.2.240
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- Kuschinsky, W., Wahl, M., Bosse, O., & Thurau, K. (1972). Perivascular Potassium and pH as Determinants of Local Pial Arterial Diameter in Cats: A MICROAPPLICATION STUDY. Circulation Research. https://doi.org/10.1161/01.res.31.2.240
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